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Title: THE ENVIRONMENTAL DEPENDENCE OF THE INCIDENCE OF GALACTIC TIDAL FEATURES

Abstract

In a sample of 54 galaxy clusters (0.04 < z < 0.15) containing 3551 early-type galaxies suitable for study, we identify those with tidal features both interactively and automatically. We find that {approx}3% have tidal features that can be detected with data that reach a 3{sigma} sensitivity limit of 26.5 mag arcsec{sup -2}. Regardless of the method used to classify tidal features, or the fidelity imposed on such classifications, we find a deficit of tidally disturbed galaxies with decreasing clustercentric radius that is most pronounced inside of {approx}0.5 R{sub 200}. We cannot distinguish whether the trend arises from an increasing likelihood of recent mergers with increasing clustercentric radius or a decrease in the lifetime of tidal features with decreasing clustercentric radius. We find no evidence for a relationship between local density and the incidence of tidal features, but our local density measure has large uncertainties. We find interesting behavior in the rate of tidal features among cluster early-types as a function of clustercentric radius and expect such results to provide constraints on the effect of the cluster environment on the structure of galaxy halos, the build-up of the red sequence of galaxies, and the origin of the intracluster stellar population.

Authors:
;  [1]; ;  [2]; ;  [3];  [4]
  1. Steward Observatory, University of Arizona, Tucson, AZ 85721 (United States)
  2. Las Cumbres Observatory Global Telescope Network, 6740 Cortona Dr., Suite 102, Santa Barbara, CA 93117 (United States)
  3. Department of Physics and Astronomy, University of Victoria, P.O. Box 3055, STN CSC, Victoria, BC V8W 3P6 (Canada)
  4. Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden (Netherlands)
Publication Date:
OSTI Identifier:
22089833
Resource Type:
Journal Article
Journal Name:
Astronomical Journal (New York, N.Y. Online)
Additional Journal Information:
Journal Volume: 144; Journal Issue: 5; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1538-3881
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTRONOMY; ASTROPHYSICS; DENSITY; GALAXIES; GALAXY CLUSTERS; LIFETIME; SENSITIVITY; STAR EVOLUTION

Citation Formats

Adams, Scott M., Zaritsky, Dennis, Sand, David J., Graham, Melissa L., Bildfell, Chris, Pritchet, Chris, and Hoekstra, Henk. THE ENVIRONMENTAL DEPENDENCE OF THE INCIDENCE OF GALACTIC TIDAL FEATURES. United States: N. p., 2012. Web. doi:10.1088/0004-6256/144/5/128.
Adams, Scott M., Zaritsky, Dennis, Sand, David J., Graham, Melissa L., Bildfell, Chris, Pritchet, Chris, & Hoekstra, Henk. THE ENVIRONMENTAL DEPENDENCE OF THE INCIDENCE OF GALACTIC TIDAL FEATURES. United States. doi:10.1088/0004-6256/144/5/128.
Adams, Scott M., Zaritsky, Dennis, Sand, David J., Graham, Melissa L., Bildfell, Chris, Pritchet, Chris, and Hoekstra, Henk. Thu . "THE ENVIRONMENTAL DEPENDENCE OF THE INCIDENCE OF GALACTIC TIDAL FEATURES". United States. doi:10.1088/0004-6256/144/5/128.
@article{osti_22089833,
title = {THE ENVIRONMENTAL DEPENDENCE OF THE INCIDENCE OF GALACTIC TIDAL FEATURES},
author = {Adams, Scott M. and Zaritsky, Dennis and Sand, David J. and Graham, Melissa L. and Bildfell, Chris and Pritchet, Chris and Hoekstra, Henk},
abstractNote = {In a sample of 54 galaxy clusters (0.04 < z < 0.15) containing 3551 early-type galaxies suitable for study, we identify those with tidal features both interactively and automatically. We find that {approx}3% have tidal features that can be detected with data that reach a 3{sigma} sensitivity limit of 26.5 mag arcsec{sup -2}. Regardless of the method used to classify tidal features, or the fidelity imposed on such classifications, we find a deficit of tidally disturbed galaxies with decreasing clustercentric radius that is most pronounced inside of {approx}0.5 R{sub 200}. We cannot distinguish whether the trend arises from an increasing likelihood of recent mergers with increasing clustercentric radius or a decrease in the lifetime of tidal features with decreasing clustercentric radius. We find no evidence for a relationship between local density and the incidence of tidal features, but our local density measure has large uncertainties. We find interesting behavior in the rate of tidal features among cluster early-types as a function of clustercentric radius and expect such results to provide constraints on the effect of the cluster environment on the structure of galaxy halos, the build-up of the red sequence of galaxies, and the origin of the intracluster stellar population.},
doi = {10.1088/0004-6256/144/5/128},
journal = {Astronomical Journal (New York, N.Y. Online)},
issn = {1538-3881},
number = 5,
volume = 144,
place = {United States},
year = {2012},
month = {11}
}